Android java & MCU Keil/uVision, STM32F

C:\>type scrcpy-serial_no.bat
rem C:\prj\2022-StandardPhaseTracer\utils\scrcpy-win64-v1.24>scrcpy.exe
rem scrcpy 1.24 <https://github.com/Genymobile/scrcpy>
rem ERROR: Multiple (2) ADB devices:
rem ERROR:     -->   (usb)      11160b600b7d0202            device  SM_G920S
rem ERROR:     -->   (usb)  To0be0filled0by0O0E0            device  X16_Power_D6F7_
rem ERROR: Select a device via -s (--serial), -d (--select-usb) or -e (--select-tcpip)
rem ERROR: Server connection failed
rem
rem

scrcpy -s 11160b600b7d0202

C:\>

- Java Thread.sleep

https://stackoverflow.com/questions/43060701/thread-sleep-not-crashes-my-app

-

https://alisyabob.tistory.com/396

-

https://stackoverflow.com/questions/17628784/how-to-timeout-an-alertdialog-in-android

- setting : 
https://www.waveshare.com/wiki/UART_GPS_NEO-6M

GPS - UBLOX NEO-6M  설정 프로그램 
- ucenter s/w 
https://www.u-blox.com/en/product/u-center

- PPS setting : 25page 
https://www.waveshare.com/w/upload/a/a9/U-blox-6-Receiver-Description-Including-Protocol-Specification.pdf

> change guide: 

-

-

package SRC_1;
import java.io.File;
import java.util.Random; 

class SampleProject {

	//public static void main() {
	public static void main(String[] args) {
		
/* 		args = new String[3]; //3개의 저장공간을 가진 배열 초기화
		args[0] = "안녕"; //배열의 첫번째 공간에 데이터입력
		args[1] = "반가워"; //배열의 두번째 공간에 데이터입력
		args[2] = "버물리라고해"; //배열의 세번째 공간에 데이터입력
		
		System.out.println(args[0]);
		System.out.println(args[1]);
		System.out.println(args[2]);
*/		
		SampleProject smpl  = new SampleProject() ; 
		
		smpl.initZeroCrossingData() ; 
	}
	
	//Integer[] zc_Tinfo_server = new Integer[60] ; 
	int[] zc_Tinfo_server = new int[60] ;
	public Integer getRandomnumber(Integer begin, Integer end){
		//For a more generic "in between two numbers" use:

		Random r = new Random();
		int low = 10;
		int high = 100;
		int result = r.nextInt(high-low) + low;

		//This gives you a random number in between 10 (inclusive) and 100 (exclusive)
		
		return result ; 
	}
	
	String[] zc_finder ; 
	int[]  zc_finderInt ;
	
	/*
	 * output: 
	 idx=52, zc_Tinfo_server=52002, zc_finderInt[k - nStart  ]=52154, nDiff=3090
Hello world
nCnt=5
zc_finder: count=5
zc_finder[k=0]=49165, 0
zc_finder[k=1]=50161, 0
zc_finder[k=2]=51157, 0
zc_finder[k=3]=52154, 0
zc_finder[k=4]=53150, 0
idx=49, zc_Tinfo_server=49067, zc_finderInt[k - nStart  ]=49165, nDiff=98
idx=50, zc_Tinfo_server=50030, zc_finderInt[k - nStart  ]=50161, nDiff=131
idx=51, zc_Tinfo_server=51088, zc_finderInt[k - nStart  ]=51157, nDiff=69
idx=52, zc_Tinfo_server=52086, zc_finderInt[k - nStart  ]=52154, nDiff=68
idx=53, zc_Tinfo_server=53029, zc_finderInt[k - nStart  ]=53150, nDiff=121
	 */
	public void initZeroCrossingData() {

		String a2 ;
		String data = "1X05,49165,50161,51157,52154,53150,\n" ;   //20240927

		String aa = data;
		//Toast.makeText(getApplicationContext(), " MCU Data : " + data, Toast.LENGTH_LONG).show();
		//Log.d("phase", " PPPPPv  ---------------    PPPPPPPPP ======= > " + data + "\n");

		// new format recv(ex. aa) : "1X05,49165,50161,51157,52154,53150,\n"  //20240927
		
		System.out.println("Hello world" ); 
		for(Integer t = 0 ; t < 60 ; t++ ) {
			Random r = new Random();
			zc_Tinfo_server[t] = t * 1000  + r.nextInt(100) ; 
		}

		a2 = aa.substring(1, 2);// get phase id like "A", "B", "C"
		if( a2.equalsIgnoreCase("X")) { // 20240927-1
				int nCnt = Integer.valueOf(aa.substring(2, 4 ) )  ; // get number of zero-corssing time info.
				aa = aa.replaceAll("\n","");
				System.out.println("nCnt=" + nCnt ) ; 
				String str = aa.replace(" ", "") ;
				//String[] zc_finder = str.split(",");
				zc_finder = str.substring(5,  str.length()).split(",") ;
				zc_finderInt = new int[ nCnt  ] ;
				int nStart =0 ;
				
				System.out.println("zc_finder: count=" + zc_finder.length ) ; 
				
				for (int k = 0 ; k< nCnt  ; k++) {// convert String info. to int, skip index k=0, it is only count information  not data 
					zc_finderInt[k] =   (int) Integer.parseInt(zc_finder[k])     ; 
					System.out.println( "zc_finder[k="+ k + "]" +"=" + zc_finder[k] +", "  + nStart) ;
				}
				
				int nDiff =0; 
				try {
					nStart = (zc_finderInt[0] /1000 )%100 ;
				}catch( Exception e) {
					e.printStackTrace() ; 
				}
				
				for(int k =  nStart  ; k <  nStart + nCnt  ; k++  ){
					//Log.d("zc_Tinfo_server" , "idx=" + k  + ", zc_Tinfo_server=" +zc_Tinfo_server [k ] ) ;
					nDiff = Math.abs(zc_Tinfo_server[k ] - zc_finderInt[k - nStart ] )  ;//get diff. between server time and finder time  
					System.out.println("idx=" + k  + ", zc_Tinfo_server=" +zc_Tinfo_server [k ] + 
							", zc_finderInt[k - nStart  ]="+ zc_finderInt[k - nStart  ] + ", nDiff=" + nDiff ) ;
				}

				return ;
		}
	}
	
	public void initZeroCrossingDataOld() {

		String a2 ;
		String data = "1X05,49165,50161,51157,52154,53150,\n" ;   //20240927

		String aa = data;
		//Toast.makeText(getApplicationContext(), " MCU Data : " + data, Toast.LENGTH_LONG).show();
		//Log.d("phase", " PPPPPv  ---------------    PPPPPPPPP ======= > " + data + "\n");

		// new format recv(ex. aa) : "1X05,49165,50161,51157,52154,53150,\n"  //20240927
		
		System.out.println("Hello world" ); 
		for(Integer t = 0 ; t < 60 ; t++ ) {
			Random r = new Random();
			zc_Tinfo_server[t] = t * 1000  + r.nextInt(100) ; 
		}

		a2 = aa.substring(1, 2);// get phase id like "A", "B", "C"
		if( a2.equalsIgnoreCase("X")) { // 20240927-1
				int nCnt = Integer.valueOf(aa.substring(2, 4 ) )  ; // get number of zero-corssing time info.
				aa = aa.replaceAll("\n","");
				System.out.println("nCnt=" + nCnt ) ; 
				String str = aa.replace(" ", "") ;
				//String[] zc_finder = str.split(",");
				String[] zc_finder = str.substring(5,  str.length()).split(",") ;
				Integer[]  zc_finderInt = new Integer[ nCnt  ] ;
				Integer nStart  ;
				
				System.out.println("zc_finder: count=" + zc_finder.length ) ; 
				
				nStart = 0 ; 
				for (Integer k = 0 ; k< nCnt  ; k++) {// skip index k=0, it is only count information  not data 
					zc_finderInt[k] = new Integer(zc_finder[ k]  )  ; 
					System.out.println( "zc_finder[k="+ k + "]" +"=" + zc_finder[k] +", "  + nStart) ;
				}				
				

				try {
					nStart = (zc_finderInt[0] /1000 )%100 ;
				}catch( Exception e) {
					e.printStackTrace() ; 
				}
				
				int nDiff =0; 
				
				for(Integer k = nStart ; k < nStart + nCnt  ; k++  ){
						//Log.d("zc_Tinfo_server" , "idx=" + k  + ", zc_Tinfo_server=" +zc_Tinfo_server [k ] ) ;
					//nDiff = Math.abs(zc_Tinfo_server[k].intValue() - zc_finderInt[k].intValue() )  ; 
						System.out.println("idx=" + k  + ", zc_Tinfo_server=" +zc_Tinfo_server [k ] + ", nDiff=" + nDiff ) ;
				}

				return ;
		}
	}	

	

}//출처: https://javacpro.tistory.com/11 [버물리의 IT공부:티스토리]


public class TestMemorySize {
	public static void memoryStats() {
	    int mb = 1024 * 1024;
	    // get Runtime instance
	    Runtime instance = Runtime.getRuntime();
	    System.out.println("***** Heap utilization statistics [MB] *****\n");
	    // available memory
	    System.out.println("Total Memory: " + instance.totalMemory() / mb);
	    // free memory
	    System.out.println("Free Memory: " + instance.freeMemory() / mb);
	    // used memory
	    System.out.println("Used Memory: "
	            + (instance.totalMemory() - instance.freeMemory()) / mb);
	    // Maximum available memory
	    System.out.println("Max Memory: " + instance.maxMemory() / mb);
	}	
	  public static void main(String[] args) {
		  memoryStats(); 
	  /* Total number of processors or cores available to the JVM */
	  System.out.println("Available processors (cores): " + 
	  Runtime.getRuntime().availableProcessors());

	  /* Total amount of free memory available to the JVM */
	  System.out.println("Free memory (bytes): " + 
	  Runtime.getRuntime().freeMemory());

	  /* This will return Long.MAX_VALUE if there is no preset limit */
	  long maxMemory = Runtime.getRuntime().maxMemory();
	  /* Maximum amount of memory the JVM will attempt to use */
	  System.out.println("Maximum memory (bytes): " + 
	  (maxMemory == Long.MAX_VALUE ? "no limit" : maxMemory));

	  /* Total memory currently in use by the JVM */
	  System.out.println("Total memory (bytes): " + 
	  Runtime.getRuntime().totalMemory() + "\n" );
	  System.out.println("KB: " + (double) (Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory()) / 1024 + "\n");
	  /* Get a list of all filesystem roots on this system */
	  File[] roots = File.listRoots();

	  /* For each filesystem root, print some info */
	  for (File root : roots) {
	    System.out.println("File system root: " + root.getAbsolutePath());
	    System.out.println("Total space (bytes): " + root.getTotalSpace());
	    System.out.println("Free space (bytes): " + root.getFreeSpace());
	    System.out.println("Usable space (bytes): " + root.getUsableSpace());
	  }
	 }
	}